Characterization of high-speed balanced photodetectors

Struszewski, Paul, Bieler, Mark, Humphreys, David, Bao, Hualong, Peccianti, Marco and Pasquazi, Alessia (2017) Characterization of high-speed balanced photodetectors. IEEE Transactions on Instrumentation and Measurement, 66 (6). pp. 1613-1620. ISSN 0018-9456

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We report the characterization of a balanced ultrafast photodetector. For this purpose, we use a recently developed time-domain laser-based vector network analyzer (VNA) to determine the common-mode rejection ratio (CMRR) of the device under test. This includes the frequency-domain response above the single-mode frequency of the coaxial connector. Although the balanced photodetector has a nominal bandwidth of 43 GHz, it generates voltage pulses with frequency components up to 180 GHz. We obtain a CMRR of better than 30 dB up to 70 GHz and better than 20 dB up to 110 GHz. The laser-based measurements are compared with the measurements using a digital sampling oscilloscope and with the frequency-domain measurements using a conventional VNA. We obtain good agreement between the three techniques with the laser-based method providing the largest measurement bandwidth, although it also constitutes the most complicated characterization setup.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Atomic, Molecular and Optical Physics Research Group
Sussex Centre for Quantum Technologies
Subjects: Q Science > QC Physics > QC0350 Optics. Light
T Technology > TA Engineering (General). Civil engineering (General) > TA1501 Applied optics. Photonics
Depositing User: Marco Peccianti
Date Deposited: 03 Nov 2016 14:04
Last Modified: 18 Jan 2018 14:14

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Project NameSussex Project NumberFunderFunder Ref
UK Quantum Technology Hub for Sensors and MetrologyG1511EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/M013294/1